Hey TMM, I've managed to port your fantastic SMStep tune to the 8-bit vintage BBC Micro, which has a 4Mhz SN76489 (so I've transposed it to sound just right). Do you mind if we release it as a demo? It will have all credit to your good self, naturally. Drop us a line at http://bitshifters.github.io if you want to get in touch.
Thanks!
Simon